An exciting night of undercard attractions will lead up to the first Premier Boxing Champions on FOX Sports Pay-Per-View event headlined by unbeaten welterweight world champion Errol Spence Jr. taking on undefeated four-division champion Mikey Garcia on Saturday, March 16 from AT&T Stadium in Arlington, Texas.

On May 25, 1964, Muhammad Ali knocked out Sonny Liston in the first round of their rematch in Lewiston, Maine. Ali landed a single right-hand counter, called the anchor punch, to knock Liston out. Rumors abounded regarding the ending as many believed Liston could have gotten up. With the win, Ali retained his world heavyweight title.